0.8.3.94:

0.8.3.94:
	Compiler fixes (touching only files in the alpha backend)
	... the assembly routine for (signed-byte 32) [sic] truncate did
		in fact work only for signed-byte 32 quantities, but was
		being called on signed-byte 64 quantities.  Fix it.
	... the translators for ASH were broken in amusing ways: some
		led to internal compiler errors when fed out-of-range
		numbers; more insidiously, others allowed temporaries
		to be overwritten in some cases.  Fix them.
	... lastly but not leastly, the %LI code to load an immediate
		was wrong in a very small proportion of cases.  After
		much scribbling, deduce why and fix it.
	... test cases to go with all of the above.